I’m comparing two roasts but can’t make sense of the Dev Time and True Dev values. For example this roast Log in | Roast.World
The time after first crack was 1:00 and the temp delta was 6.7 IBTS and 9ish on BT. In the analyzer the Dev time shows as -423s which is roughly 7 minutes (ignoring the “-” sign) which is the time to FC (so almost like the inverse dev time).
True Dev shows 3.37 C and -428.5s which makes no sense to me.